Trane RTAC 140-400 ton units (50 HZ) User Manual

126

RTAC-SVX01F-EN

Diagnostics

The following Diagnostic Table contains all diagnostics possible arranged
alphabetically by the name assigned to each diagnostic. Not all diagnostics are
available unless TechView is installed.

Legend to Diagnostics Table
Hex Code: 3-digit code used to uniquely identify diagnostics.

Diagnostic Name: Name of the diagnostic as it appears at DynaView and/or
TechView displays.

Severity: Defines the action of the above effect. Immediate means an instantaneous
shutdown of the affected portion. Normal means routine or friendly shutdown of the
affected portion. Special Mode means a particular mode of operation is invoked, but
without shutdown, and Info means an Informational Note or Warning is generated.

Persistence: Defines whether or not the diagnostic and its effects are to be manually
reset (Latched), or can be either manually or automatically reset (Nonlatched).

Criteria: Quantitatively defines the criteria used in generating the diagnostic and, if
nonlatching, the criteria for auto reset.

Reset Level: Defines the lowest level of manual diagnostic reset command which can
clear the diagnostic. The manual diagnostic reset levels in decreasing order of priority
are: Local, Remote and Info. For example, a diagnostic that has a reset level of
Remote, can be reset by either a remote diagnostic reset command or by a local
diagnostic reset command, but not by the lower priority Info Reset command.

Hex
Code

Diagnostic Name

and Source

Severity

Persis-
tence

Criteria

Reset

Level

398

BAS Communication Lost

Special

NonLatch

The BAS was setup as "installed" at the MP and the Comm 3 LLID lost
communications with the BAS for 15 contiguous minutes after it had
been established. Refer to Section on Setpoint Arbitration to determine
how setpoints and operating modes may be effected by the comm
loss. The chiller follows the value of the Tracer Default Run Command
which can be previously written by Tracer and stored nonvolatilely by
the MP (either use local or shutdown).

Remote

390

BAS Failed to Establish
Communication

Special

NonLatch

The BAS was setup as "installed" and the BAS did not communicate
with the MP within 15 minutes after power-up. Refer to Section on
Setpoint Arbitration to determine how setpoints and operating modes
may be effected. Note: The original requirement for this was 2
minutes, but was implemented at 15 minutes for RTAC.

Remote

2E6

Check Clock

Info

Latch

The real time clock had detected loss of its oscillator at some time in
the past. This diagnostic can be effectively cleared only by writing a
new value to the chiller's time clock using the TechView or DynaView's
"set chiller time" functions.

Remote

Chilled Water Flow (Entering
Water Temperature)

Info

NonLatch

The entering evaporator water temp fell below the leaving evaporator
water temp. by more than 2°F for 100 °F-sec. For RTAC this diagnostic
cannot reliably indicate loss of flow, but can warn of improper flow
direction through the evaporator, misbound temperature sensors, or
other system problems

Remote

5EF

Comm Loss: Chilled Water
Flow Switch

Immediate

Latch

Continual loss of communication between the MP and the Functional
ID has occurred for a 30 second period.

Remote

5F2

Comm Loss: Cond Rfgt
Pressure, Circuit #1

Immediate

Latch